Sound Unit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Sound is caused by | vibrations
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| Medium | any material through which a wave travels (solid, liquid, gas)
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| Sound can not travel through | a vacuum
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| Intensity | the amount of energy in a sound, or loudness
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| Pitch | how low or high a sound is
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| Echo | a reflected sound wave
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| Reverberation | repeated echoes of sound
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| crest | highest point of a wave
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| trough | lowest point of a wave
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| wavelength | the distance between two crests or two troughs
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| frequency | how many wavelengths pass a fixed point each second
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| amplitude | height of a wave
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| rest positon | describes a wave at rest, not passing on energy
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| ultrasonic waves | sound waves that have frequencies above the human range of hearing
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| Sound will travel fastest through a | solid - steel
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| Sound waves can be absorbed by materials such as | carpet, curtains, foam
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| Sound waves can be reflected by materials such as | bare walls, caves, mountain tops
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| compressions | dense regions of sound waves where molecules push together
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| rarefactions | less dense regions of sound waves where molecules spread apart
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| Sonar | used by ships and submarines - a system that uses reflected sound waves to detect and locate objects underwater
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| Echolocation | the use of reflected sound waves to determine distances or to locate objects
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| Sonar and Echolocation | use ultrasonic sound waves to detect objects or prey
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| hammer, anvil, stirrup | amplify sound
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| cochlea | has nerve fibers that vibrate to pick up different pitches
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| auditory nerve | sends electrical impulses to the brain for interpretation
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| Eustachian tube | helps drain fluid from the middle ear
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| Hearing Aid | electronic device worn to amplify sound
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| Cochlear Implant | surgically implanted device that sends electrical impulses to the auditory nerve
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
cbeltrani
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